Forced-lubrication system



Jan. 1, 1935. F SCHMIDT 1,986,5 39

FORCED LUBRICATION SYSTEM Filed May 11, 1931 2 sheets-sheet l Jan. 1, 1935. F, ScHMHDT 1,9se,s39

FORCED LUBRICATION SYSTEM Filed May 11, 1931 2 Sheets-Shee'rl 2 Ffg. 2

Invenfar:

and finally rises to the passage 53 through the bore 11 and its radial passages 10 and 52. The oilrotates with the purifier 23, 12, and its impurities are hurled toward the Vertical wall of the purifier where they form a layer v59. Vanes, not shown, may be provided in the purifier for en-- training the oil. The volume of the purifier is so large that a considerable quantity of vimpurities may collect at 59 without interfering with the flow ofthe oil tothe pump. Of course the purifier should be cleaned periodioally but there will be no trouble if this is neglected for a long time;V

The suction Valve 14 is not indispensible but is preferably provided for keepingfftheoil in ithel .the purifieras in the case of Fig. 1. The pump 'Fig'si '2`and 3'may therefore also be disposed at a :point remote.lfrom, for outside, the crank case pump when the sump is drained..

Referring now to Figs. 2 and 3, 15 is Va of. the worm 17,55 isja washer von-top of 'the;pin,

and 33 is thepartly hollow shaft of Vthe pumpv` both sides which make up two casingsj21, and 40,: is a centrifugal disc which is also diVided and castj; integral with the halves ofp the boss and the casings. 22 are worm wheels in the casings 21 which are-mounted to rotate on bushings' surrounding pins 41. i

. The V portions 12 and 2,3 ofthe purifier are mounted respectively on'a shoulder 58, at A-Vthe I lower'end of the hollow shaft extension 19; andj; on the solid upper end of the'shaft 33,.with pack= ingV washers 5,6 and 57` above and below, -and 7a threaded annulus 34 for holding the upper washer:

5,6 down onthe neck ofu the upper portion 23, 242' i is afgrooved ring for the reception of the edges of 23 and 12, and 35 is a filling plug.

I ber of the pump, both enclosed by the hollow 4'1: shaft extension 19. 25 is a. suction passage in the stemiof the worm 17 which opens into the purifier; at itsbottom, and 38 is aphole near 'the upper v end of the extension 19. The oil is drawnuintov the pump as indicated by the arrows, and forced` intol the delivery chamber 30. Connected to the-` delivery chamber is a passage 31, also -in the stem of:v the worm 17, to which is connected. the delivery pipe 32. 36 is a relief valveconnected ltothe delivery chamber 30. The same means which rotates the centrifugal in Fig. 2 may also rotate thepumn; I .i

Infoperation the worm wheels 22 rotate bodily about the axis of the snart 33 with their casing 21 and at thesame time are rotatedpby'v meshing withthe worm 17. The oil is forced from 37-to. 30, and finally discharged through 532. In flow-.

ingfrom themupper end of the suction passage 25ytov the Opening 38 the oil flows past the discV 40 andthe casings 21 by which the centrifugal 1 action of the purifier is assisted. The impurities Zcollect at 59 and are removedr periodicallybut,

as in the pump Fig. 1, neglect will Vnot cause trouble immediately.

The relief4 Valve 36 is provided for the following reason:

l'I'he sizeof the pump must be such that it will supply oil enough ifvthe oil is'hot, and the in-- creas'edconsumption with increasingwear of the bearing's etc. :must alsobe considered. On the.

otherhand the pressuremight become too high v bearing' plate, with a hole in its centre, -16 isal-bracket'''N which is held to the lower face of the plate by screws 54, and 17 is a worm extending-zupvvards-v`l from the bracket.V 18 is a pin at the upper end under normal conditions and with cold oil. The Valve 36 takes care of the excess pressure. The oil from the relief Valve 36 does not return to the sump 5 but remains in the purifier so that the oil in the sump is not stirred. The oil from the relief Valve is subjected to centrifugal action again and returned to the pump at 38. The oil which fiows to the pump from the sump 5 is only so much as required at the Vbearings-for maintaining the predetermined oil pressure in the system.

As compared with the pump Fig. 1 the pump Figs. 2 and 3 has the advantage that the oil enters a stationary member for here the cage 26 of the suction -valve`14 is fixed and does not rotate with of the engine, and connected to the sump by a pipe at the -end of cage 26.

I'am'not limited to any particular field in the application of my invention which may be adapted .wherever it is desiralile that a pump, and the stationsitsupplies, should be kept clean.

1. In a forced-lubrication system, an oil pump, asuctionand a delivery conduit connected to said pump, a pump shaft, a; centrifugal purifier onsaidshaft, lan outer casing forming part of said` purifier, a suction pipe connected to vsaid outer fcaSng and said suction conduit, andan inner casingconnectedlto said outer casing and said delivery Jxconduit.

2. In -a forced-lubrication system, an oil pump, a suction and a delivery conduit connected to said pump, a centrifugal purifier on the suction side of said pump, meansdfor rotating said puriw fier, and pumping members in said purifier which are adapted to rotate bodily' therewith.

3. In aforced-lubrication. system, an oil pump, a suctionanda delivery conduit connected to said pump, a centrifugal purifier on the suction side of saidpump, means for rotating said purifier, pumping members in said purifier, means foi` rotating said members bodily with said purif fier, and means fixed with respect to said purifier for rotating said members about their own axes. 4. In a forced-lubricationsystem, an oil pump, a suctionvand a delivery conduit connected to said pump, a centrifugal purifier on the suction side of said pump, a hollow shaft forming part of said' conduits, on which shaft said purifier is secured, and avfixed member forming the suction and delivery chambersof'said pump with said hollow shaft.

5. In a forced-lubrication system, an oil pump r including fla fixed worm, a cylinder mounted to rotate on said worm and making a tight fit with the crests, a lcasing' on said' cylinder., a worm Wheel in said casing inl mesh with said worm. means for rotating said cylinder about the axis of saidworm, and a purifier on the suction side. of said pump mounted to rotate with said cylinder and surrounding said casing.

. 6. In a forced-flubrication system, an oil pump.

including afixed wormlhaving a suction and a deliveryconduit, a-cylinder mounted to rotate on said worm, making atight fit with its crests and measse havnga rotating member, means for operating the rotating member, a suction and a delivery conduit connected to saidpump, a centrifugal nurifier;` rotating about an axis of a `'member of said pump and connecting with said rotating member of the pump, a casing fomiing part of said purifier and being closed circumferentially, means for connectmg said casingnear its centre to a suction pipe,` and means for7 Connecting an opposite part of the casng to said suction conduit of the pump.`

8. In arforced-lubrcation system, an oil pump, a suction and a delivery conduit: connected to said pump, a centrifugal purifier on the suction side of said pump, means for rotating said purifier, pumping members in said purifier which are adapted to rotate bodily therewith, and a "relief valve connected to said delivery conduit FRITz SCHMIDT. 

